package com.deer.im.config;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;

import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;

/**
 * FastJson序列化类
 * @author deer
 * @date 2022年3月18日
 * @param <T>
 */
public class FastJson2JsonRedisSerializer<T> implements RedisSerializer<T> {

	public static final Charset DEFAULT_CHARSET = StandardCharsets.UTF_8;

	static {
		ParserConfig.getGlobalInstance().setAutoTypeSupport(true);
		// 若是遇到反序列化autoType is not support错误，请添加并修改一下包名到bean文件路径
		// ParserConfig.getGlobalInstance().addAccept("com.xxxxx.xxx");
	}

	private final Class<T> clazz;

	public FastJson2JsonRedisSerializer(Class<T> clazz) {
		super();
		this.clazz = clazz;
	}

	/**
	 * 序列化
	 */
	@Override
	public byte[] serialize(T t) throws SerializationException {
		if (null == t) {
			return new byte[0];
		}
		return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
	}

	/**
	 * 反序列化
	 */
	@Override
	public T deserialize(byte[] bytes) throws SerializationException {
		if (null == bytes || bytes.length <= 0) {
			return null;
		}
		String str = new String(bytes, DEFAULT_CHARSET);
		return (T) JSON.parseObject(str, clazz);
	}
}
